Machine for cutting, shaping, and beveling watch crystals and the like



Feb. 12,1935. J $H|FFMAN 1,991,231

MACHINE FOR CI J'ITING, SHAPING,-AND BEVELING WATCH CRYSTALS AND THELIKE Original Filed July 15, 1932 4 Sheets-Sheet 1 INVENTOR /50MJ'H/FFMA-m ATTORN EYS @L/QWM Feb. 12, 1935. J sHlFFMAN 1,991,231

MACHINE FOR CUTTING, SHAPING, AND BEVELING WATCH CRYSTALS AND THE LIKEOriginalFiled July 15, 1932 4 Sheets-Sheet 2 PM R15 7 H f5 INVENTQRJEEOME SH/FFMAM ATI'ORNEYS Feb. 12, 1935.

J. SHIFFMAN MACHINE FOR CUTTING, SHAPING, AND BEVELING WATCH CRYSTALSAND THE LIKE Original Filed July 15, 1932 4 Sheets-Sheet 3 4/ .39.jl'wa. Z

. 1w INVENTOR L/EEOMA' SH/FFMAM Y ORNEYS J. SHIFFMAN 1,991,231

MACHINE FOR CUTTING, SHAPING, AND BEVELING WATCH CRYSTALS AND THE LIKEFeb. 12', 1935.

Original Filed July 15, 1932 4 Sheets-Sheet 4 w 0 W/WWQ J m M. w a a s aQ l l l I l I INVENTOR Jaeomz J/fl/TMAM BY f ATI'ORN l- Y$ Patented Feb.12, 1935 UNITED STATES PATENT OFFICE MACHINE FOR cu'r'rnvo, snarmo, nnssvsnme wa'rcn cars-rails AND 'rrm- LIKE 15, 1932. Serial No. 755,783

:16 Claims.

This application is a substitute application filed in lieu ofapplicant's forfeited application, Serial No. 622,620, filed July 15,1932, and relates to improvements in grinding machines, and morecparticularly to that type of machine for the grinding and shaping ofwatch crystals and lenses made of transparent material such as glass. orcelluloid as set forth in my prior forfeited the machine may be adjustedto cut' the edges of a; watch crystal to bevels of different angles; athird, to provide means for moving the watch crystal holder away fromthe cutting element when the crystal has been completely out forremoving the same. from the holder; fourth, to provide means of rotatingthe crystal at the proper rate with respect to the rotating grindingelement; fifth, to provide means for gradually feeding the watch crystalblank to the cutting "element at the start of the operation so as toprevent chipping; sixth, to design and arrange a machine so as the samemay accomplish similar results when used on lenses or other objects ofsimilar sizes, shapes and materials; seventh, to provide suitable meansfor centering the blanks of crystals or lenses in the blank holder,

With these. and other objects in view, the invention resides in thecertain novel construction,

combination and arrangement of parts, theessential features of which arehereinafter fully described, are particularly pointed out in theappended claims, and are illustrated in the accompanying drawings, inwhich:-

Figure l is a front elevational view of my improved cutting machineshowing the parts in operative position, v

Figure 2 is a top plan view, but showing in dotted lines the position ofthe template and work holding frame when it is desired to position apiece of work in the work holding means,

Figure 3 is a side elevational view, Figure'4 is a horizontal sectionalview through the pattern or template clamping jaw adjusting mechanism, I

Figure 5 is a detail horizontal sectional view This application December3, 1934,

showing in top plan, the turntable and the work blank positioning means,

Figure 6 is a front elevational view with the carriage in position toreceive a blank to be cut and illustrating the cutting wheel liner rodin operative position,

Figure 7 is an enlarged detail horizontal sectional view on the line 7-7of Figure 6,

Figure 8 is an enlarged detail horizontal sectional view on the line 88of Figure 1, v

Figure 9 is a vertical sectional view on the line 9-9 of Figure 6, butshowing the follower Eember in position instead of the grinding wheelFigure 9a is a detail horizontal sectional view on the line 9a-9a ofFigure 9,

Figure 10 is a vertical sectional view on th line 10-10 of Figure 6,

Figurell is a detail perspective view of an attachment for reducingvibration of the work during a cutting operation and for indicating thevibrations thereof,

Figure 12 is a detail fragmentary perspective view of the opposite sideof the attachment.

Referring to the drawings by reference characters, the numeral 10designates a base provided with downwardly extending legs 11 which maybe screwed or bolted to a permanent support, Fixedly secured to the base10 and rising upwardly therefrom are three round rods or posts 12, 13and 14, the same being arranged in triangular formation as best seen inFigure 2 of the drawings for supporting at their top atriangular shapedbracing frame 15. The posts 12 and 14 are arranged in alinement whenlooking from the front of the machine while the post 13 is offset ordisposed to the right of the same.

Fixedly or adjustably supported upon the base 10 is an electric motor16, the armature shaft 17 of which extends forwardly and fixedlysupports a worm 18, while fixed to the extreme outer end of the shaft 17is a knife edge cutting wheel 19. Extending forwardly of the base 10 andsecured thereto is an L-shaped bracket 20, the upstanding arm 21 ofwhich supports a bearing 22 for the outer end of the armature shaft.Enclosing a portion of the cutting wheel 19 is a segmental shaped guardor casing 23 which contains a sponge or other like wiping element 24 formaintaining the cutting edge of the wheel 19 in a clean condition duringuse. A bracket 25 is pivotally mounted upon the base 10 for supporting awater can or tank 26 from which a tube or pipe 27 leads to a pointadjacent the cutting edge of the wheel 19. The sponge or wiper 24 alsocal serves to absorb the water from the tank 26 to maintain the cuttingedge in moistened condition. A valve 28 is arranged in the pipe 27 forcontrolling the flow of water therethrough.

.Swingingly mounted upon the rod 12 is a frame 29, the same beingprovided with knuckles or bearing portions 30 through which the rod 12extends. An expansion coil spring 31 is interposed between the lowerknuckle 30 and the base for normally urging the frame 29 upwardly uponthe rod 12, although the said frame may be adjusted to a lower levelagainst the action of the spring 31 in a manner and for the purposehereinafter explained. The frame 29 is swingable from a position againsta stop 31 fixed to the base 10 to a position in the direction toward thecutting wheel 19 and carried by the stop 31' is a spring clip 32 whichengages the frame 29 to releasably hold the frame against the stop 31'.

For the purpose of tending to normally move the frame 29 toward the stop31', a coil spring 33 is provided, one end being fixedly connected tothe post 14 while the opposite end is connected to the frame 29 at apoint adjacent its axis. It will thus be seen that in order to swing theframe 29 in a direction toward the cutting wheel, it is necessary to doso against the action of the spring 33.

The same 29 includes upper and lower alined bearings 34 and 35respectively, while journaled in the bearing 34 is a shaft 36. Fixed tothe shaft 36 directly above the bearing 34 is a gear wheel 37 whilefixed to and disposed above the gear 37 is an annular fiange 38 whichsupports a disc plate 39, the top of which is provided with a spiral ribor wall 40. The disc 39 is freely turnable with respect to the shaft 36and the flange 38, but fixed to the shaft 36 and disposed above the'disc39 is a turn table or work support 41. The turn table or work support 41is provided with diametrically opposed elongated slots 42 through whichscrews 43 pass, and which screws also extend through threaded openingsin coacting gripping or holding jaws 44. The tops of the jaws 44 restupon the top of the turn table 41 and. portions of the same extendthrough the slots 42, for the purpose of preventing turning of the jawsin order that gripping faces of the same will at all times remain inopposed relation. The free ends of the screws or bolts 43 extend intothe spiral channel formed by the spiral rib or wall 40. From thedescription just mentioned, it will be noted that by imparting rotationto the disc 39, the jaws 44 may be simultaneously moved either toward oraway from each other depending upon the direction of rotation of thedisc 39. The inner facing sides of the jaws 44 are provided withV-shaped notches or recesses 45 to receive the template or pattern whichin the present instance is shown as a watch casing A provided with theusual bezel B, for receiving and retaining a crystal. When the watchcasing B is positioned upon the table 41, the jaws may be moved toclamping position to securely hold the casing in axial alinement withrespect to the shaft 36 which isessential to the operation of the deviceas will be hereinafter appreciated. The periphery of the disc 39 isknurled to enable the firm gripping of the same during the adjustment ofthe jaws 44.

Fixedly attached to the lower end of the shaft 36 is a non-slidable workclamping jaw 46, the clamping face of which is provided with a cushionmember 47 offelt or the like provided with a concavity in its workingside. Being fixed to the shaft 36, the jaw 46 will of course rotatetherewith. Slidably mounted in the bearing 35 which is disposed in axialalinement with the shaft 36 is an elongated member 48, the lower end ofwhich is provided with an internally screw threaded bore 49 whichthreadedly receives a screw 50 having an outer knurled head 51. The Icoil spring 52 is interposed between the head 51 and the lower end ofthe bearing 35 so that the screw is at all times under tension and willbe prevented against accidental unscrewing. The

Y upper end of the tubular member 48 is provided with a socket 53 whichreceives the shank 54 of a clamping jaw 55, the same having a resilientcushion member 56 similar to the cushion member 47 of the jaw 46 and islikewise provided with a concavity. The jaw 55 may be termed avertically movable or slidable jaw which coacts with the jaw 46 forsupporting the work or blank C during a cutting operation and which inthis in= stance is in the form of a glass, celluloid or like transparentcrystal for the watch casing A.

For the purpose of imparting sliding movement to the jaw 55 so as tomove the same into clamping engagement with the jaw 46 and to a posi-.

provide a bell crank lever 57 which is pivoted to the frame 29 as at 58,one arm of the said lever extending beneath the frame 29 and terminatingin a cam portion 59 which engages the head 51 of the screw 50. Inaddition to the aforementioned function of the spring 52, the same alsoacts to move the jaw 55 and its correlated parts to released position asshown in Figure 6 of the drawings. Pivotally connected to the other armof the bell crank 57 is an actuating cam lever 60, the cam portion 61being engageable with the side of the frame 29 when the said lever isswung upward in order to cause the said lever to slide the jaw 55 toclamping position. The clamping position of the actuating cam lever isclearly illustrated in Figure 3 of the drawings.

When gripping the blank C between the jaws 46 and 55, it is desired thatthe pressure be sufficient to securely hold the same without breaking,and therefore it may be necessary to adjust the sliding jaw 55 which maybe accomplished by the manual manipulation of the head 51 of the screw50 so that the member 48 may be slid rela tively to its bearings 35.

It is most essential that the blank C be accurately positioned withinthe work holding jaws 46 and 55 and axially with respect to the shaft36. For this purpose, a work carrier mechanism is provided fortransferring the blank C from a position after thesame has been centeredwith respect to the watch casing A (see Figure 10) to the work holdingjaws 46 and 55. The carrier comprises a bifurcated body 62 which isslidably mounted upon the rod or post 13, but is held against turningmovement with respect thereto. For this purpose, a groove or channel 63is formed in the post 13 lengthwise thereof in which a key or rib 64formed on the carriage 62 extends, there being a flat spring 65 carriedby the key or rib for engagement with one of the walls of the slot '63in order that the carriage may be manually slid lengthwise of the rod,but will be supported against accidental sliding movement. In otherwords, it is essential that a slight tension be provided between thebody 62 of the carriage and the rod 13, otherwise the carrier would dropby gravity.

Pivotally mounted in the bifurcated portion of the body 62 as at 66, area pair of arms 67, which 25 tion away from the jaw to release the blank,I V

extend outwardly from the body and terminate in inwardly curved fingers68. An expansion coil spring 69 abuts the inner side of the arms 6'1 andtends to normally move the same away from each other whereas the saidarms are provided with recessed portions '10 for engagement by the innerends of adjusting screws '11-, the same being threadedly mounted in thebifurcated body 62. Itwill be seen that by turning the screws'll in onedirection, the arms may be moved toward each other against the action ofthe spring '69 whereas turning of the screws in an opposite directionwill enable the said spring to move the arms away from each other, or toan expanded position. By reference to Figures and 10 of the drawings itwill be seen that the finger ends 68 of the arms 67 grip the blank C andby the turning of the screws '11 the said blank may be properlypositioned over the bezel B of the watch casing A to assure that theproper size blank has been chosen, and the said blank is transferredfrom this position to the work holding jaws 46 and 55 by swinging theframe 29 toward the cutting wheel 19 soas to be disposed out of the pathof the carrier. When the carrier has been slid downwardly so that theblank C is on the proper horizontal plane with respect to the workholding jaws, the frame 29 is swung back to engage the stop 31 wherebythe blank is in the same axial alinement with respect to the axis of thework holding jaws as it was when disposed in an elevated position withthe blank overthe watch casing A. By swinging the cam lever 60 upwardly,the j aw 55 will move upwardly into clamping engagement with the jaw 46and the blank will be held in working position as illustrated in Figures1 and 3 of the drawings. After the working jaws receive the blank, thescrews '11 are turned to cause the arms 6'1 to release the blank, thusthe frame 29 is free to be swung to a position wherein the blank isengaged by the cutting wheel 19.

It is essential that the turn table 41 be rotated at a very slow rate ofspeed, thus it is necessary that a reduction drive be provided betweenthe motor 16 and the shaft 36. 1

Fixed or keyed to the rod 12 intermediate the bearings 30 of the frame29 is a bearing member 69 which supports a vertical counter shaft '10,the lower end of which is provided with a gear '11 which is in constantmesh with the gear 18 of the motor'shaft 1'1. The upperend of the shaft'10 carries a gear '12 which is in constant mesh with a combination wormand gear element 73. The'element '13 includes an annular series of teeth74 which are longer than the teeth of the gear wheel '72 in order toenable the gear element '13 to move vertically with respect to themember '18 pivoted to the rod 12 above the combination gear and worm'13. Also fixed to the shaft '17 is a worm '19 whichpperatively connectswith the gear 3'1 on the shaft 36. A spring 80 has one of its endsfastened to the frame member 29 adjacent its pivotal axis, while thefree end is disposed in a slot, or notch in the underside of the bearingmember '18. The member '18 functions as a clutch member in transmittingmotion from the worm '19 to gear 3'1 while the spring 80 serves to holdthe member '18 in an engaged and disengaged position at the will oftheoperator.

It will thus be seen that a continuous drive is provided between theworm 18 and the gear 3'1, and that due to the various reducing gears andworms a relatively slow turning movement will be imparted to the turntable 41 and the work holding means.

In order that the work holding means be adjusted so that the crystalblank B held therebetween may be adjusted to a position either above orbelow the horizontal axis of the grinding wheel 19, or on a plane inalinement with the axis thereof, it is necessary to provide some meansfor securing the frame 29 in various positions of vertical adjustment.As previously mentioned, the spring 31 tends to normally force the frame29 upwardly on the rod 12, but adjustable stop means is provided andwhich will now be explained.

The rod 12 is rovided with an elongated slot 81 which extendstherethrough and in which a stop plate 82 is slidably mounted.Interposed between the stop plate and the bottom wall of the slot 81 isan expansion coil spring 83 which tends to normally force the plateupwardly. Slidable in a bore 84 extending upwardly from the slot 81 is apin or rod 85, the upper end of which is engageable by the inner end ofan adjusting screw 86 threaded into the top of the rod 12.

82, which plate is provided with outwardly ext nding wings 83 disposedin the path of the collar 84 resting upon the bearing member "18. Byturning the screw 86 in an opposite direction, the spring 83 will forcethe plate 82 upwardly whereupon the spring 31 will of course cause theframe 29 and the bearing 78 to correspondingly move upwardly. Thus bymanipulating the screw 86, the horizontal plane of the blank C held inthe work holding means of the, frame 29 may be adjusted so that the workor blank C\may be disposed above or below the horizontal axis of thegrinding wheel or on a plane in alinement with the axis thereof. Bypositioning the work above and below the horizontal axis, oppositebevels are of course cut upon the edges of the blank whereas if theblank is brought into engagement with the cutting wheel in alinementwith the axis thereof, a vertical or perpendicular edge is procured.

Fixedly secured to the rod 12 above the bearing member '18 is a stop arm8'1 which extends forwardly and is offset with respect to the axis ofthe rod 12, as will be seen by reference to Figure 1 of the drawings.Threadedly carried by the outer end of the arm 8'1 is an adjusting screw88, the head of which is provided with calibrations 89 for indicatingthe adjustment of the screw. Also threaded to the arm is a second stopscrew 90 but the same is disposed inwardly of the screw 88. Pivoted uponthe rod 12 directly above the point of attachment of the stop arm 8'1 isan arm 91 which is urged toward the stop arm 8'1 by reason of a spring92, the said spring being of a greater tension than the tension of thespring 33 fora purpose to be hereinafter appreciated. The outer end ofthe arm 91 is provided with a vertical threaded bore 93-for threadedlyreceiv- -ing a follower pin or screw 94, the same being provided with aknurled head 95 at its upper end and with a point 96 at its oppositeend. By ad-' justing the screw 88, the point of the follower pin 94 maybe properly alined with the cutting edge of the cutting wheel 19. Thescrew 93 is adjusted before starting to out a crystal so that the arm 91is held slightly away from the stop arm 87- and when the cuttingoperation is started, the screw 90 is gradually withdrawn so as to allowthe arm 91 to rest directly against the arm 87. Thus, as the crystalisgradually advanced toward the grinding or cutting wheel at the startof a cutting operation, chipping of the crystal is avoided.

It has already been explained how the work is lined up with respecttothe bezel B of the watch casing A and carried to a position to bereceived by-the work holding jaws 46 and 55. With the work clampedbetween the said jaws, the frame 29 is swung over in a direction towardthe cutting wheel 19, it being understood that the pattern or templatein the form of the casing A is in position upon the turn table 41. Whenswung over toward the cutting wheel, the follower pin 94 is screwed downso that the point 96 seats or engages the bezel B of the watch casingwhich of,

course prevents the frame from swinging to an inoperative position. aWhen the follower pin has been engaged with the template or casing A,the machine is ready for operating as the 'work C in the form of acrystal is in contact with thecutting wheel 19. When the motor 16 isturned on, the power will be transmitted through the reducing gearsand-worm to the shaft 36 which in turn will rotate the turn table 41 ata very slow rate of speed. During rotation the follower pin 94- beingengaged with the bezel B of the watch casing A will cause the frame 29which supports the work holder to move in a direction toward and awayfrom the cutting wheel 19 whereby the work orcrystal is cut to a shapecorresponding to the shape of the bezel B.

-In Figure 6 of the drawings I have illustrated an alining or turningbar '97 which is dropped through the threaded bore 93 and includes aknurled head 98 at its upper end. The bar 97 adjacent the knurled headis provided with a transversely disposed pin 99 which seats in notchesor grooves in the top of the stop arm 91. The lower end of the bar 97terminates in areduced portion 101 which is triangular shape in crosssection as shown in Fig. 7, and the apex or point of this portion isadapted to be [brought into vertical alinement with the cutting edge ofthe cutting wheel 19. This adjustment is accomplished by themanipulation of the screw 88,

and after adjustment is effected, the follower pin 94 is replaced. Thelower end of the bar .97 when in positionis disposed just, below thehorizontal axis of the cutting wheel 19.

In Figures 11 and 12 of the drawings, I have illustrated an attachmentin connection with the machine. The attachment is for indicating thevariations in thickness of the'crystal blank to facilitate the correctadjustment of the lower surface of the blank. For example, one blank maybe slightly thicker than a preceding one for which the machine isadjusted, and which would have the plane of its lower surface disposedto the cutting wheel at a point slightly lower than that of a blank ofnormal thickness for .which the machine is set. Thus, the cutting wheelwould not cut the blank at the desired angle. The device comprises anarm 102 which is insertible in a bracket 103 secured'to the arm '21 "ofthe bracket 20 and which bracket 103 is horizontally disposed. A setscrew 104 threads into the .bracket 103 for clamping the arm 102 in anadhead 105 is a pivot bolt 106 which carries at its free end a head orblock 107. The lower end of the screw 106 is provided with a head whilea spring 108 is interposed between the'said head and the under side ofthe head 105. A set screw 109 is threaded in the head 105 for securingthe pivot bolt 106 in an adjusted position both vertically androtatably. Fixedto the block 107 is a curved arm 110, one end of whichterminates in a segmental shaped portion 111.

Pivoted to the portion 111 as at 112 is an indicating lever 113 which ismovable over the segmental shaped portion 111, the said lever beingprovided with an angular arm 114. Pivoted to one side of the arm as at115 is an arcuate shaped lever 116, one end of which is provided with atooth 117 which engages the arm 114 of the lever 113, while the oppositeend of the lever 116 removably and adjustably supports a pointed pin118, the adjustment constituting a set screw 119 threaded into the endof the lever 116. A stop 120 extends from the lever 116 and overlies thetop of the arm 110 while a stop 121 depends from the arm 110 into thepath of downward movement of the lever 116. The stops 120 and 121 limitthe movement of the lever 116 in opposite directions. tened to one sideof the segmental portion 111 and bear against the free end of theindicating lever 113 for urging the same to a normal position whereasthe indicating lever is movable over the segmental portion 111 againstthe action of the spring in a manner now to be explained.

In the use of the device or attachment shown A wire spring 122 is fasinFigures 11 and 12, the same is adjusted so engaged with the undersidethereof, and if the work is the correct thickness, the indicator remainsat neutral, but any variation in thickness will cause the movement ofthe indicator and visibly indicate such difference. Thus variations inthickness of glass can be detected and cor,- rected by adjusting theplane of the lower surface of the blank through operation of the screw86 above referred to. 1

From the foregoing description, it will be seen that I have provided amachine for cutting watch crystals into any desired shape toaccuratelyfit the bezels of watch casings, and although especiallydesigned for this purpose, the machine may also be adapted for otherpurposes such as the cutting of various shaped lenses.

While I have shown and described what I deem to be the most desirableembodiment of my invention, I wish it to be understood that variouschanges as come within the scope of the appended claims may be resortedto if desired.

Having thus described the invention, what I claim as new and desire tosecure by Letters Patent, is:-

1. In a machine of the class described, 9. r0:- tatable cutting wheel,a. swingably mounted frame for movement toward and away from saidcutting wheel, spring means tending to move said frame away from saidcutting wheel, rotatable work holding means mounted in said frame, atemplate support rotatable with said work holding means, and disposed inaxial alinement with said work holding means, means for setting a pieceof work over a template, when in position ing means axially alined withsaid template sup-' port, spring means acting to move said work holdingmeans away from said cutting wheel, a follower device engaging the bezelof said watch casing, a source of power for said rotatable cuting wheeland said template support andsaid rotatable work holding means, andspeed reducing means between said source of power and said rotatablesupport and work holding means.

3. In a machine of the class described, a rotatable cutting wheel, aswingable'fra'me, spring means acting to move said frame in a directionaway from said cutting wheel, a template support rotatably mounted insaid frame, adjustable coacting clamping jaws on said support foraxially positioning and holdinga template upon said support, andreleasable rotatable work clamping jaws mounted in said frame anddisposed on the same axis as said template support, and a followermember adapted to be engaged with a template supported upon saidtemplate support.

4. In a machine of the class described, a rotatable cutting wheel, aswingably mounted frame for movement toward and away from said cuttingwheel, spring means tending-to move said frame away from said cuttingwheel, rotatable work holding means mounted in said frame, a templatesupport rotatable with said work holding means, a follower deviceadaptedto engage the template supported by said template support, and means forvertically adjusting said frame for positioning the work holding meanson a level with, or below or above the horizontal axis of said cuttingwheel.

5. In a machine of the class described, a rotatable cutting wheel, aswingably mounted frame mounted for movement toward and away from saidcutting wheel, spring means tending to move said frame away from cuttingwheel, stop means for limiting the swinging of said frame in a'directionaway from said cutting wheel, releasable catch, means for holding saidframe against swinging movement when brought into engagement with saidstop means, rotatable work holdingmeans mounted on said frame, atemplate support rotatably mounted in said frame and turnable with saidwork holding means, a vertically slidable carrier, adjustable clampingmeans on said carrier for initially supporting a piece of work and foralining the same relative to atemplate adapted to be placed upon saidtemplate support, said carrier adapted to be moved to a position aftersaid frame is swung clear of the same to position the piece of work forreception by said work holding means, and a follower member adapted tobe engaged with a template on said template support when said frame isswung to a position under tension of said'spring means.

6. .In a machine of the class described, a base, a rodrising verticallyfrom said base, a horizontal drive shaft journalled on said base, acutting wheel carried by said drive shaft, a frame swingably supportedby said rod and movable towardand away from said cutting wheel, atemplate support rotatably supported by said frame, means for axiallypositioning and holding a template upon said template support, workholding means mounted in said frame and rotatable with said templatesupport, spring means acting upon said frame to swing the same in adirection away from said cutting wheel, reduction gearingconnecting saidrotatable template support with said drive shaft during swingingmovements of said frame, a stop arm fixedly carried by said rod, an armpivotally mounted on said rod and movable in the pathof said stop arm,spring means acting upon said arm to move the same toward said stop arm;and a follower member threaded in said arm and to engage the template tobe supported upon said template support for guiding said frame back andforth relative to said cutting wheel.

7. In a machine of the class described, a base. a rod rising verticallyfrom said base, a horizontal drive shaft journaled on said base, a.cutting wheel carried by said drive shaft, a frame swingably supportedby said rod and'movable toward and away from said cutting wheel, atemplate support rotatably supported by said frame, means for axiallypositioning and holding a template upon said template support, workholding means mounted in said frame and rotatable with said templatesupport, spring means acting upon .said frame to swing the same in adirection away from said cutting wheel, reduction gearing con- -nectingsaid rotatable template support 'with said drive shaft during swingingmovements of said frame, and a follower member adapted to engage thetemplate to be supported upon said template support for guiding saidframe back and forth relative to saidcutting wheel, a post rising fromsaid base, a carrier slidable but nonrotatably supported upon said post,adjustable coacting gripping jaws mounted on said carrier adapted toreceive and position a piece of work relative to a template carried bysaid template support preparatory to delivering the same to said workholding means.

8. In a machine of the class described, a base, a rod rising xerticallyfrom said base, a horizontal drive shaft journaled on said base, acutting I wheel carried by said drive shaft, a frame swingably supportedby said rodand movable toward and away from said cutting wheel, atemplate support rotatably supported by said frame, means for axiallypositioning and holding a template uponsaid template support, workholding means mounted in said frame and rotatable with said templatesupport, spring means acting upon said frame to swing the same in adirection away from said cutting wheel, reduction gearing connectingsaid rotatable template support with, said drive shaft during swingingmovements of said frame, a stop member fixedly supported upon said rod,an arm turnably mounted upon said rod, 9, spring acting to move said armtoward said stop member. and being of a greater tension than the springmeans acting upon said frame, and a follower pin threadedly carried bysaid arm and adapted to be engaged with a template carried by saidtemplate support.

9. In a machine of the class described, a rotatable template support, awatch casing mounted on said template support and having a bezel, avertical rod, a horizontal swingablearm mounted on said rod, a stopmember fixed to said rod and disposed in the path of swinging movementof said arm, spring means for urging said arm in a direction toward saidstop member, and a follower pin threadedly mounted in said arm forengagement with a bezel in a watch casing held by said template support,a rotatable knife edge cutting wheel, and means for adjusting the stopposition of said arm to aline the follower pin with respect to the knifeedge of said cutting wheel.

11. In a machine of the character described, a rotatable cutting wheel,a vertical standard, a swingable frame mounted on said standard, arotatable template support journaled in said frame, rotatable workholding means journaled in said frame and operatively connected to saidrotatable,

template support, a follower device pivoted on said standard and adaptedto engage a template held on said template support, a stop fixed to saidstandard in the path of movement of said follower device, spring meansacting upon said follower device to normally position the same againstthe stop and cause the work held by said work support to engage saidcutting wheel, said spring means permitting said frame and followerdevice to be swung as a unit in a direction to cause the work held bysaid work support to be disengaged from said cutting wheel.

12. In a machine of the character described, a rotatable cutting wheel,a vertically slidable frame, spring means tending to move said frameupwardly, work holding means carried by said frame, and means forholding said frame in an adjusted position against the action of saidspring means for adjusting the level of said work holding meanstosupport a piece of work either on the same horizontal axial plane assaid cutting wheel or on a horizontal plane above or below the axis ofsaid cutting wheel.

13. In a machine of the character described, a rotatable cutting wheel,work holding means, means for adjusting the level of said work holdingmeans to support a piece of work either on the same horizontal axialplane as said cutting wheel, or on a horizontal plane above or below theaxis of said cutting wheel, and means adapted to engage the under sideof a piece of work for visibly indicating the variation of thickness ofthe work held by said work holding means when the same is set for thecutting of a piece of work of a predetermined thickness.

in position upon said template support to properly position the samerelative thereto and for subsequently transferring a piece of work tothe work holding means while in set position, and a follower deviceadapted to engage the'template supported by said template support.

15. In a machine of the class described, a rotatable cutting wheel, aframe mounted for movement toward and away from said cutting wheel, stopmeans for limiting the swinging movement of said frame in a directionaway from said cutting wheel, releasable means for holding said frameagainst swinging movement when moved into engagement with said stopmeans, rotatable work holding means mounted on said frame, a templatesupport rotatably mounted on said frame and turnable with said workholding means,

a carrier mounted for up and down movement,

clamping means on said carrier for initially supporting a piece of workand for alining the same relative to a template adapted to be placedupon said template support, said carrier adapted to be moved to aposition after said frame is swung clear of the same to position thepiece of work for reception by said work holding means, and a followerdevice adapted to be engaged with a template on said template supportwhen said frame is swung to an operative position toward said cuttingwheel.

16. In a machine of the class described, a cutting wheel, a frame membermounted for swinging movement toward and away from said cutting wheel,work holding means mounted in said frame, a template support rotatablymounted in said frame and disposed above said work holding means, aslidable carrier member movable to a plane above said template supportand movable to the plane of said work holding means, and work clampingmeans on said carrier for supporting a piece of work above said templatesupport to position the same relative to the template which is adaptedto be positioned thereon, said carrier adapted to be lowered to aposition to the plane of said Work holding means for delivering theretothe work adapted to be held by said clamping means.

JEROME SHIFFMAN.

